An image forming apparatus includes a sheet storage unit including a sheet tray on which one or more sheets are to be stacked, a sensor configured to detect that the sheet storage unit is being operated, and a processor configured to execute a predetermined process after the sensor detects that the sheet storage unit has been operated, and a predetermined condition relating to an occurrence of the sheet conveyance error is satisfied.

A recording apparatus includes a recording head, a loading unit, a feeding unit, a cover, a detection unit, and a determination unit. The feeding unit feeds a recording medium loaded on the loading unit to a recording position where the recording head performs the recording. The cover moves between an opening state and a closing state. The determination unit determines a size of the loaded recording medium based on a result of a width detection operation. The recording head records an image per a determination result. If the cover closing is detected before the recording is performed, the determination unit performs the width detection operation to determine the recording medium size loaded on the loading unit. If the cover opening is detected and the recording apparatus receives a recording instruction, the determination unit performs the width detection operation to determine the recording medium size loaded on the loading unit.

An example apparatus includes a lift plate of a tray to hold a print medium. A support member is operatively connected to the lift plate. A sensor is attached to the support member to measure a distance of the lift plate from the sensor. A processor may receive a measurement of the distance of the lift plate from the sensor, and output an indicator describing an amount of print media in the tray based on the measurement of the distance of the lift plate from the sensor.

An example apparatus includes a lift plate of a tray to hold a print medium. A support member is operatively connected to the lift plate. A sensor is attached to the support member to measure a distance of the lift plate from the sensor. A processor may receive a measurement of the distance of the lift plate from the sensor, and output an indicator describing an amount of print media in the tray based on the measurement of the distance of the lift plate from the sensor.

The present subject matter describes determination of amount of print media present in an input tray of a printing system. In an example implementation of the present subject matter, a current operating torque of a motor that moves a pick arm for drawing print media from the input tray is monitored. The current operating torque is monitored while the pick arm is moved between a rest position and a pick-ready position. Based on the monitored operating torque, it is determined whether amount of print media present in the input tray is one of below and above a predefined amount of print media.

The present subject matter describes determination of amount of print media present in an input tray of a printing system. In an example implementation of the present subject matter, a current operating torque of a motor that moves a pick arm for drawing print media from the input tray is monitored. The current operating torque is monitored while the pick arm is moved between a rest position and a pick-ready position. Based on the monitored operating torque, it is determined whether amount of print media present in the input tray is one of below and above a predefined amount of print media.

A recording apparatus includes: an apparatus body that includes a recorder that performs recording on a medium; an opening-and-closing member that is able to be opened away from and closed toward the apparatus body; a unit module that is detachably attached to an attachment portion configured to become exposed by opening the opening-and-closing member, and constitutes a part of a first medium transportation path when attached to the attachment portion; a second medium transportation path that is provided above the first medium transportation path; and a path forming member that is located above the attachment portion and forms a part of the second medium transportation path; wherein the path forming member is retracted from the second medium transportation path and advances onto the opening-and-closing trajectory of the opening-and-closing member when the unit module is detached from the attachment portion.

An image forming apparatus includes: a conveyance path that conveys a sheet; registration rollers that are arranged across the conveyance path and each comprise a nip part; a sheet locking member that locks a front end of a sheet conveyed in the conveyance path, where the sheet locking member swings between a first attitude and a second attitude, in the first attitude the sheet locking member locks the sheet on an upstream side of the nip part, and in the second attitude the sheet locking member is retracted to a downstream side of the nip part and allows the sheet to pass through the nip part; an energizer that energizes the sheet locking member to maintain the first attitude; and a hardware processor that detects deterioration of the energizer.

A controller recognizes a remaining level of sheets in a sheet feeding cassette. The controller counts the required time after a sheet feeding rotary member starts to rotate until a sheet feeding sensor senses the tip end of a sheet. The controller judges whether a sheet feeding delay has occurred based on the required time. The controller calculates the incidence of sheet feeding delays for each sheet remaining level.

A controller recognizes a remaining level of sheets in a sheet feeding cassette. The controller counts the required time after a sheet feeding rotary member starts to rotate until a sheet feeding sensor senses the tip end of a sheet. The controller judges whether a sheet feeding delay has occurred based on the required time. The controller calculates the incidence of sheet feeding delays for each sheet remaining level.